Crossword Genius

Very obvious trail grew confused (4,5)

Ross

I believe the answer is:

writ large

'very obvious' is the definition.
(I've seen this before)

'trail grew confused' is the wordplay.
'confused' indicates anagramming the letters.
'trail'+'grew'='trailgrew'
'trailgrew' anagrammed gives 'WRIT LARGE'.

(Other definitions for writ large that I've seen before include "Emphasised" , "exaggerated" , "on a mass scale" , "very obvious" .)

I've seen this clue in The Times.
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